Effect of naphthalene acetic acid on yield attributes of cowpea cultivars

An experiment was carried out to investigate the response of two different varieties of Cowpea i.e. Kashi Unnati and Kashi Kanchan to different concentrations of Naphthalene Acetic Acid (NAA) i.e. 10, 20 and 30ppm. These concentrations of NAA were evaluated for physiological efficacy in factorial randomized design with five replications each. Physiological parameters such as germination percentage, shoot, root length, seedling length and seedling vigour index as well as yield parameters such as No. of pods/ plant, No. of seeds/ plant, 1000 seed weight and seed yield/ plant were studied during the present investigation. Each concentration of NAA showed positive effect on all the growth parameters studied, the effect of 30 ppm concentration remained greater on both varieties. However, variety Kashi Kanchan had an edge over Kashi Unnati.